Andrew Giroux, 49, and his son Dustin Giroux, 25, were found dead Sunday within hours of each other at the camp, which they were sharing with four other men as part of a weekend outing, Maine State Police said. The camp is on Line Road.

“They had a party the day before for Dustin’s fiancee, and they were to be married on the 21st of this month,” said Annie Cote, 78, of Saco, who has been a neighbor and friend of the Giroux family for about 30 years. “There was a big party there Saturday across the street for the girl that was going to be their daughter-in-law, so the guys went up to that camp afterwards.”

Reached for comment Monday evening, Stephen McCausland, spokesman for the Maine Department of Public Safety, described the gathering as a “man’s weekend” based on police interviews with family members and the other men at the camp. Asked if it was a bachelor party, he said it was possible, although he was not sure if witnesses had termed it as such.

“We know the younger man was due to be married later this month,” McCausland said, adding that police had also been told the men were preparing the camp for the coming hunting season.

The men went to the Bear’s Den in Dover-Foxcroft on Saturday night to celebrate, according to the Portland Press Herald.

McCausland said it was apparent to police that alcohol was consumed at the gathering.

“There was alcohol present as you would find at most man’s weekends,” he said. McCausland said what role, if any, alcohol played in the deaths would not be known until the autopsy results were in.

McCausland said the other four men at the camp were friends of the dead men and had all cooperated with police.

The older Giroux was found dead outside the camp Sunday morning, and the younger man was found in his bed a short time later. Investigators will need the results of autopsies set for today in Augusta to learn what killed the men, state police said.

“That’s what an autopsy is for,” McCausland said earlier Monday. “We have questions as well. It is unusual that we will cite a death as unexplained, but that’s what it is at this point.”

No signs of foul play were immediately seen.

Much of Dustin Giroux’s Facebook page was blocked to public viewing on Monday, but Ashleigh S. Dixon was among the 281 people listed as his friends, and her Facebook page listed her as engaged to Giroux.

Attempts to contact the Giroux family and Dixon were unsuccessful on Monday.

According to the Portland Press Herald, Giroux and Dixon have a 7-month-old son.

Relatives of the Girouxs suspect the men might have died from food poisoning, Cote said Monday.

“They [family members] said they thought that they must have eaten something bad or had something there. They had stopped somewhere on the way to eat, but they don’t know why Andy and Dustin [Giroux] died,” said Cote.

No one was at the family-owned camp when a Bangor Daily News photographer visited Monday. The camp appeared to be very neat and well-appointed, with a small garden and several fruit trees. A red Chevrolet SUV with the Maine license plate KICK-BAC was parked in the driveway. A passer-by said he often saw vehicles at the camp.

Andrew Giroux was a retired schoolteacher, as is his wife, Nancy. They were known for being very friendly and community-minded, said Cote and Stanley W. Mozden Jr., another neighbor. They raised six sons. Andrew owned A&D Giroux Heating of Saco. Dustin was vice president, according to a Facebook page dedicated to the company.

“We didn’t know them well. The impression we have always had of them is that they are good people, hardworking. Like all of us, they enjoyed taking some time off,” Mozden said Monday. “They enjoyed using their boat and going fishing. I know that they enjoyed that very much.

“They were quiet as far as the neighborhood is concerned,” he added. “They were not somebody that you would put down as people who might cause a ruckus or anything like that.”

Cote said she and her husband visited the Girouxs as soon as she heard the news on Sunday to try to comfort them.